-- This script returns the version of the highest .NET Framework installed

function getDotNet()
    local strVersion = "0.0.0.0";
	local DotNet_Key;
	
	-- retrieve keys from the registry
	tNETVersions = Registry.GetKeyNames(3, "SOFTWARE\\Microsoft\\NET Framework Setup\\NDP");
	
	Table.Sort(tNETVersions);
	
	for i, key in pairs(tNETVersions) do
		DotNet_Key = "SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\" .. key;
        if (Registry.GetValue(HKEY_LOCAL_MACHINE, DotNet_Key, "Install", true) ~= "") then
        	if (Registry.GetValue(HKEY_LOCAL_MACHINE, DotNet_Key, "Version", true) ~= "") then
            	strVersion = Registry.GetValue(HKEY_LOCAL_MACHINE, DotNet_Key, "Version", true);
            else
            	-- get the ver from the key name
            	strVersion = String.Mid(key, 2, -1);
            end
        end
    end

	-- return last value (highest .NET Framework)
    return strVersion;
end